Hamilton



(No Model.) 4 Sheets--Sheet 1.

T. SETTLE. MACHINE FOR GRINDING METAL PLATES.

No. 286,855. Patented Oct. 16, 1883.

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4 ShetsSheet 2.

(No Mode l.) T. SETTLE.

MACHINE FOR GRINDING METAL PLATES. No. 286,855.

Patented 00p.- 16, 1883.

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(No Model.) 4 Sheets-Sheet 3.

T. SETTLE. MACHINE FOR GRINDING METAL PLATES.

No. 286,855. Patented Oct. 16, 1883.

4 Sheets- Sheet 4.

(No Model.)

T. SETTLE. MACHINE FOR GRINDING METAL PLATES. No. 286,855.

Patented Oct. 16, 1883.

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I i s UNITED STATES THOMAS SETTLE, OF PHILADELPHIA, PA., ASSIGNORTO-HAMILTON, ALBERT H. HORACE 0., AND IVILLIAM DISSTON, OF SAME PLACE.

MACHINE FOR GRINDING METAL PLATES.

SPECIFICATION forming part of Letters Patent No. 286,855, dated October16, 1883,

Application filed July 30, 1893. (No model.)

To all whom it may concern Be it known that I, THOMAS SETTLE, a subjectof the Queen of Great Britain and Ireland, and a resident ofPhiladelphia, Pennsylvania, United States of America, have inventedcertain Improvements in Machines for Grinding Metal Plates, of which thefollowing is a specification- The object of my invention is to provide amachine for grinding saws or other metal blades with a device forautomatically returning the blade overthe stone; and this objectI attainin the manner which Iwill now proceed to describe, reference being badto the accompanying drawings, in which- Figures 1, 2, and 3, Sheet 1,are diagrams illustrating the essential features of my invention; Fig.at, Sheet 2, a side view of a sawgrinding machine with my improvements;Fig. 5, Sheet 8, a longitudinal section of the same; and Fig. 6, Sheet4., a plan view,partly in se'ction.

I will first describe the essential features of my invention byreference to the diagrams, Figs. 1, 2, and 3, in which A represents partof the stone of a machine for grinding saws or other metal blades orplates, andB the bar by which the blade is pressed against the stone.For convenience, I will describetheinvention as applied to a machine forgrinding saw-blades.

In front of the bar B are the usual feed rolls a a, and in the rear ofthe bar are the draft'rolls b b, thesebeing common in ordinarysaw-grinding machines. s

In the rear of the rolls 1) b are a series of rolls, d, (1, and darranged one above another, these rolls being driven in the directionspointed out by the arrows. A plate, f, is pivoted below and in the rearof the lower roll, d, the plate having weighted arms, the tendency ofwhich is to throw the plate forward or toward the rolls, the upper edgeof the plate in the present instance being adjacent to the central roll,61. Some distance in the rear of the plate f are a series of pivoted andweighted fingers, one only being shown in the diagram, as the fingersare arranged side by side. The saw-blade I passes from the rolls 1) 12,between the lower rolls,d cl, and strikes the plate f,which yields,

as shown in Fig. l, and permits the plate to pass over it, as shown inFig. 2. Before the blade is clear of the rolls (1 d the outer end of thesame strikes the fingers g and causes the same to yield, as shown inFig. 2, this move ment continuing until the inner end of the blade isfree, when, owing to the weighted arms of the plate f, the latterelevates the said free end of the blade, to which at the same time aforward thrust is imparted by the action of the weighted fingers g, theinner end of the blade being thus pushed between the upper rollers, 61'd-iwhereby it is returned over the stone. By this means one attendant isenabled to run the machine, whereas two are at present required-one tofeed the blades to the stone, and another to return them.

Various modificationsof the devices for carryi ng out my invention maybe devised without departing from the main features of the invention.For instance, instead of an independent set of rollers, (I, (2, at anextra roller may be placed above the top draft-roller, b, so as to servewith the latter to return the blade, and spring-arms may be used inplace of thepiv oted and weighted plate f and fingers g,- or, instead ofthe latter,arotating friction-drum may be employed, the tendency ofwhich will be to feed forward the blade resting upon it. The devicesshown in the diagrams are, however, preferred, and in Figs. 4, 5, and 6I have shown an organized machine embodying the same.

The shaft of the stone is adapted to suitable bearings on the oppositeside framesfD D, guided on which is a frame, F, the latter beingvertically adj ustable by suitable screw-rods, and being connected byrods h to suitable counterbalancing devices, which it hasnot been deemednecessary to show in the drawings. This frame carries the bar B, thefeed and draft rolls a and b, the return attachment above described, andthe gearing for operating the same. The various rolls are driven from ashaft, m, which in the present instance is the shaft of the lowerdraft-roll, b. This shaft has a spurwheel, 1, geared, through anintermediate pinion, 2, and spur-wheel 3, to the shaft of thelowerfeed-roll, a. Another spur-wheel,4, on

the shaft on, drives, through an intermediate pinion, 5, the train ofspur-wheels 6,which gear together the rolls d, cl, and (P. The plate fis pivoted to opposite studs a on the frame F, and the fingers g arehung toa transverse rod, 19, carried by slides G,which can be adjustedon the bars of the frame F, so as to suit blades of different lengths.

I claim as my invention 1. The combination of the stone of agrinding-machine and rolls for feeding a blade forward over the samewith a pair of return-rolls, and with mechanism, substantially asdescribed, whereby the inner end of the blade after leaving thefeed-rolls is lifted up to and is thrust backward between thereturn-rolls, as specified.

2. The combination of the stone and feedrolls,the return-rolls, thepivoted and weighted plate f, adjacent thereto, and mechanism,substantially as described, whereby a backward thrust is imparted to theblade, as set forth.

name to this specification in the presence of 30 two subscribingwitnesses.

W THOMAS SETTLE.

lVit-nesses HARRY DRURY, HENRY HowsoN, Jr.

